Warp stop-motion for looms.



G. M. FOSTER.

WARP STOP MOTION FOR LOOMS.

urmonron IILED JULY 1, 1908.

911,002. 7 I Pajtented'Jan. 26,1909.

the art;

UNITED STATES PATENT omen GEORGE M. FOSTER, OF MANCHESTER, NEW HAMPSHIRE, ASSIGNOR OF ONE-HALF TO WILLIAM PARKER STRAW, OF MANCHESTER, NEW HAMPSHIRE.

WARP STOP-MOTION FOB LOOMS.

Patented Jan. 26, 1909.

To all whom it mayconcem:

Be it known that I, GEORGE M. FOs'rER, a

citizen of the United States, and resident of Manchester, county of Hillsboro, State of New Hampshire, have invented an Improvement in' arp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawing, is a specification, like letters on the-drawing representing like parts.

This invention relates to war stop-motions for looms of the type wherein drop devices or detectors are maintained in inoperative position by intact warp threads, failure of a thread permitting its detector to move into the path of and arrest a normally vibrating feeler, to thereby effect the operation of a loom stopping instrumentality'.

My present invention has for its main object the production of means to obviate the subjection of a released detector to undue strain when engaged by the feeler, s0 thatthe drop devices or detectors may be made of light weight without danger of distortion or crushing.

The various novel features of the invention will be fully described in the subjoined specification and particularly pointed outin the following clalms.

Figure 1 is a transverse sectional view of a portion of a loom with one embodiment of my invention applied thereto; Fig. 2 is a front view, centrally broken out, of the warp stop-motion; Fig. 3 is a sideelevation thereof similar to Fi 1 but showing the feeler at the end of its fee ing or detecting stroke; Fig; 4 is a sectional view on the line 4- 4, Fig. 2, looking toward the left and illustrating the arrest of the feeler by a released detector.

In the present embodiment of my invention each detector ordro device 1, which is conveniently made of thin, flat sheet metal, is longitudinally slotted at 2 and threads 3, 4 from the two divisions of the warp are passed therethrough, so that each detector cooperates with two warp threads, that thread in the upper plane of the shed holding the detector up in inoperative position, as in Fig. 1,

in a manner well known to those skilledin A frame 5 extended across the loom between the harnesses and the lease-rods has a transverse bar 6 at its top, extended through slots 7 at the upper ends of the detectors, the latter being thus placed side by side in a series, the lower ends of the detectors being guided between'the foot of the frame 5' and a rear guide-bar 8.

Depending extensions 9 of the frameprovide bearings for a rock-shaft 10 having an attached feeler 11, of suitable construction, normally vibratable below the lower ends of the detectors by means to be described, said rock-shaft having at one end a rocker-arm 12 having a stud 13 extended loosely into a slot 14 in a link 15 herein shown as pivotally connected at its forward end to the lay-sword 16 at that side of the loom. Referring to Fig. 2 a spring 17 is attached at one end to the extension 9 and coiled around the rock-shaft, the other end of the spring being suitably secured to said shaft, thewinding of the spring being such that it tends to turn the shaft forward to effect the feeling or detecting stroke of the feeler, in the direction of arrow 18, Fig. 1. By reference to Fig. 1 it will be seen that this stroke is effected as the lay swings back,

and if the feeler is arrested by a released detector the link 15 slides along the stud 13, while on the forward beat of the lay the rear end ofthe slot 14 engages the stud and turns the rock-shaft 10 to retract the feeler.

Thus the force of the spring is only required to be sufficient to move the feeler forward, and a released detector is not subjected to anything but the spring-induced ressure when the loom is stopped, as wil be ex plained.

At oneside of the frame 5 I provide a bearing 19 in which is slidably mounted and supported the rear end of a link 20 pivotally 7 upturned, slotted ear 23 which is pivotally mounted a dog 24 having its end or tail 25 weighted to elevate the dog into the position shown in Figs. 1 and 4. i

A light rod or link 26 is pivotally connected with and depends from the dog and passes loosely through a slot 27 in an arm 28 fast on the feeler rock-shaft 10, the foot of the link being enlarged, as at 29, the arm and link constituting a lost-motion connection between thefeeler 11 and the dog, the arm vibrating with the feeler, as will be obvious.

The lay 30 has attached to it a bunter 31 so arranged that upon the back stroke of the lay said bunter will engage the dog, if Q eratively positioned, Fig. 4, and will act trough the dog to move the link 20 rearward and release the shipper.

Viewing Fig. 1 let it be supposed the lay is moving back, and the spring 17 is just about to effect the detecting stroke of the feeler, the dog 24 being held in the bunter path by the weight 25. If no detector is released the full, detecting stroke of the feeler is made, and as the arm 28 swings down it hits the foot 29 and draws down the link 26 and the dog into the position shown in Fig. 3, so that the dog is inoperatively positioned and cannot be engaged by the bunter 31. A lug 32 on the dog engages the front of the ear 23 and limits such movement of the dog. If, however, a detector is released by failure of one of its war threads such detector drops into the pat of and arrests the feeler, as shown in Fig. at, and as the arm28 is then held up there is nothing to move the dog out of the path of the bunter and the latter engages the dog, and through it actuates the link 20 to efl'ect shipper release. As the bunter engages the dog and moves back with the lay the dog may turn on its pivot, but it cannot turn further than is permitted by the stop 32. Owing-to the lost-motion or slip connection between the link 26 and the arm 28 the bunter-induced movement of the dog is not transmitted in the slightest degree to the feeler, so that the engaged detector cannot be subjected to any pressure other than that due. to the light spring 17, and hence the released detector will not be bent, twisted or damaged in any Way.

It will be obvious that the weight 25 lifts the dog into the bunter path as the lay on its forward beat acts through the rod 15 and arm 12to retract the feeler.

The apparatus is simple, direct acting, and durable, and cannot be readily disarran ed or put out of order.

arious changes in details may be made bythose skilled in the art without departing from the spirit and scopeof my invention as set forth in the annexed claims.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a loom, a lay having a bunter, a shipper, releasing means therefor, including a dog to cooperate with the hunter, and a weight to position the dog in the hunter path, a series of detectors held in inoperative position by intact warp threads, a normally vibrating feeler to engage and be arrested by a released detector, a lost-motion connection between the dog and feeler to move the dog out of the bunter path except when the feeler is arrested by a detector, said connection permitting free movement of the dog when engaged by the bunter, and a spring to effect the detecting stroke of the feeler and the inoperative positioning of the dog.

2. In a loom, a lay having a bunter, a shipper, releasing means therefor, including a dog to cooperate with the hunter, a series of detectors held in inoperative iosition by intact warp threads, a vibratable feeler to engage and be arrested by a released detector, a spring to effect the detecting stroke of said feeler, means connecting the lay and feeler to retract the feeler by the forward stroke of the lay, means operated by the detecting stroke of said feeler and including a lost motion connection to inoperatively position the dog except when the feeler is arrested by a detector, and separate means acting independently of the feeler and its connections to normally position the dog in the bunter path.

3. In a loom, a lay having a bunter, a shipper and its knock-off lever, a link connected with and to move the lever, a dog pivotally mounted on said link and weighted to position it in the bunter path, a series of detectors maintained inoperative by intact warp threads, a normally vibrating feeler to engage and be arrested by a released detector, an arm movable with the feeler and having a lost motion connection with the dog, to inoperatively position it except when the feeler is arrested by a detector, said connection permitting movement of the dog with the link when the bunter engages said dog, and yielding means to effect the detecting stroke of the feeler.

i. In a loom, a lay having a bunter, a shipper and its knock-off lover, a link connected with and to move the lever, a dog pivotally mounted on said link, the dog having an attached weight to lift it into the bunter path, a series of detectors each cooperating with a plurality of war) threads and maintained inoperative when said threads are intact, a feeler normally vibrating below said detectors and adapted to engage and be arrested by a released detector, a slotted arm vibrating in unison with He 11,002 a the feeler, alink pivotally connected with the In testimony whereof, I have signed my dog and extended through the slot, said link name to this specification, in the presence 10 having an enlarged foot to be engaged by the of two subscriblng witnesses.

arm and depressed to inoperatively position 5 the dog on each detecting stroke of the GEORGE FOSTER feeler except when the latter is arrested by a Witnesses: detector, and a s ring to effect the detecting VELMER PRINCE,

stroke of the fee er. ROBERT L. MANNING. 

